Word 2007 error - This file is read-only

Consider that you are working on a very important document and your manager wants it immediately. After a few minutes, you click Save. And to your surprise, the Word 2007 document says that "This file is "read-only". Shocked and no time to do a Google search?

The solution to this annoying pop-up screen is very simple. Do the following steps to avert this problem:
1. From within the Office 2007 document, click the Office button or Ribbon.
2. Click the Word Options button.
3. Click Advanced in the Word Options screen that appears.
4. Scroll down to the Save section.
5. If the Allow background saves box is selected, click once to clear it.

6. Click the OK button, and reopen the document.
Note: Repeat these steps if you get the same error again.